Question

1. A 1400 kg car is moving at 15 m/s when it hits a tree and comes to rest 0.30 seconds later. How

much force does the car experience?

Answer 1

F = 70000 N

Step-by-step explanation:

Given that,

Mass of a car, m = 1400 kg

Initial speed of the car, u = 15 m/s

Finally, it hits the ground, v = 0

Time, t= 0.3 s

We need to find the force experienced by the car. Using Newton's second law of motion to find it.

F = ma

a is acceleration of the car.

`F=(m(v-u))/(t)\\\\F=(1400* (0-15))/(0.3)\\\\=-70000\ N`

So, the force experienced by the car has a magnitude of 70000 N.